“Selena was so scared that Abel would cheat on her that she paid a woman in plain clothes to spy on him at the music festival and keep his female fans away,” tattles a source close to the pop star, whose possessiveness contributed to her split from Justin Bieber. “But Able is a good guy. He’s loyal and treats his girlfriends well. Selena clearly still has a lot of work to do when it comes to trust issues.”